1399543894578 has 8 divisors (see below), whose sum is σ = 2799087789168. Its totient is φ = 466514631524.

The previous prime is 1399543894561. The next prime is 1399543894741. The reversal of 1399543894578 is 8754983459931.

It is a sphenic number, since it is the product of 3 distinct primes.

1399543894578 is an admirable number.

It is a super-2 number, since 2×1399543894578² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116628657876 + ... + 116628657887.

It is an arithmetic number, because the mean of its divisors is an integer number (349885973646).

Almost surely, 2^{1399543894578} is an apocalyptic number.

1399543894578 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1399543894578 is a wasteful number, since it uses less digits than its factorization.

1399543894578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233257315768.

The product of its digits is 1175731200, while the sum is 75.

The spelling of 1399543894578 in words is "one trillion, three hundred ninety-nine billion, five hundred forty-three million, eight hundred ninety-four thousand, five hundred seventy-eight".